US187414A - Improvement in stone and ore crushers - Google Patents

Description

UNITED` STATES PATENT @Errea ANTHONY POLLOK, OF WASHINGTON, DISTRICT OF COLUMBIA, ADMINIS- TRATOR OF HENRY ROWLAND MARSDEN, DEOEASED, ASSIGNOR TOl GEORGE DALTON, OF LEEDS, ENGLAND.

IMPRQVEMENT'IN STONE AND ORE CRUSHERS.

Specification forming part of Letters Patent No. 1,871,414, dated February 13, 1877; application tiled September 12, 1876.

To all whom it lmay concern `Be it known that HENRY BowLAND Maus- DEN, late of Leeds, in the county of York, England, deceased, did in his life-time invent certain Improvements in Stone and Ore Crushers, of which the following is a specifi? This invention relates to that description of more nearly to that of a perfect cube than is :attainable with the apparatus as heretoforei constructed; a further object ofthe invention is to facilitate the fitting of the jaws, and to dispense with the white-metal joint ordinarily l required.

In carrying out the invention, in order to obtain these objects, the apparatus is con- -structed and arranged in the following manner, reference being had to the several liigures yon the accompanying drawings, which representa machine consisting of a stationary jaw and a movable jaw.

The sam-e letters indicate like parts in all the figures.

Figure l of the accompanying drawing represents .a sectional elevation ot' a complete machine having the improvements which form the subject of this invention applied thereto.

tw'o jaws. Fig. 3 represents a front elevation of the movable jaw 5 and Figs. 4, 5, and 6 rep resent, respectively, front and back elevations and .sectional plan of the. stationary jaw.

A B is the removable working-face of the ,Fig. 2 represents a section taken through the Y movable jaw, 'and O is the jaw-stock. D E is l the removable working-face of the stationary v jaw, and F is the portionof .the frame into' which it is fitted.

According to one part of the invention, in

lieu of making the longitudinal line of the teeth straight or a continuous contour from the top ofl the jaw-to the bottom thereof, an abrupt recession is made in the plane of the teeth, as shown at a a, Fig. 2, so that the longitudinal line of the portion of the toothed surface which is above the point a-viz, from a to b-projects to some extent beyond the longitudinal line of the portion of the toothed surface which is below the point a-videlicit, from a to c.

By means of this arrangement, the stone under operation, after it has been first broken by the upper portions a b, on reaching the top of the-lower portion a c, is caused to roll kor turn .over by reason of the sudden change or recession in the plane of the face of the teeth, whereby the stones are reduced to ,an approximately perfect cuboidal form, in lieu of to a semi-elongated form, as is frequently the case when operated upon in the apparatus as previously constructed.

In the drawings, both the 'stationary jaw and the movable jaw are shown as constructed with the recession a; -but either of them may be lnade straight, or of a continuous contour from the top b to the bottom c, the' other only being formed with the recession a.

The lines of the points ot' the teeth and of the intervening furrows are continued straight from the top b as far as the point a, only below which point the teeth are diverted later- .allythat is to say, the points d d of the uppreferred to construct them ot' smaller pitch, l v as shown in the drawing.

The mode of arranging the teeth of the lower portion of the opposite jaws .may be varie-d; .but the arrangement in the example illustrated has been found convenient and eicient in practice.

In this example, the teeth of the lower portion of the movable jaw are continued-uniform from the point a to the bottom c, with the eX- ception that a transverse iiat surface is provided at a', while those of the lower portion of the stationary jaw are similar at the part-s e and c, but their points and furrows are a'gain diverted at the intermediate portion f. In the upper portions, moreover, the points of the teeth of one jaw are arranged opposite the furrows of the other jaw, while at the extremity of the lower portions the points of the teeth of one jaw are arranged opposite the points of the teeth of the other jaw.

The working-faces of the jaws are made renewable, and they may also be made reversible from top to bottom,and from back to front, S0 as to obtain four successive wearing-surfaces.

In the example shown in the drawings the removable working-faces are made reversible from top to bottom only, in the following manner: The working-faces are constructed in two mainparts, as shown, A B being those of the movable, and D E those of the stationary jaw, the upper parts A and D, respectively, of which terminate at their lower ends at the point of recession of the plane of the face of the teeth, so that each part of 'either jaw may be reversed separately. The lips g h of the jaw-'stock C are slightly undercut, and a wedgepiece, G, is employed for securing the two parts A Bin position; by the act of tightening which wedge-piece, by the aid of bolts and nuts the two parts are forced outward into, and` maintained in, their place, a tongue and recess at g h', Fig. 3, serving to prevent any lateral movement.

In fitting the working-face A B to the jawstock C, if the usual white-metal joint is not employed, it is requisite that the front surface of the jaw-stock and the back surface of the working-face A B should be planed true and smooth; but as it is also indispensable that the working-face'be made of a very hard material, it has hitherto been found impracticable to dispense with the joint'of-white metal.

' According .to this invention the required Objectis effected in the following manner: A metal plate 4or mold is first prepared to the shape of the counterpart of the jaw-face to be produced, and white iron (that is to say the hardest mixture of metal practicable) in a molten condition is then poured into a sufficient height to form the toothed portion of the face, after which the mold is filled with hematite or other suitable `iron in one continuousl to employ the arrangement shown in the draw- 1 ing. In this case the parts DE, which are cast of hard metal, have wrought-iron or other suitable soft metal bars or strips llcast at theirback by placing the bars in a mold and pouring in the metal around them, so as t0 form a surface suiciently soft to be capable of being planed. And as it is requisite -that the abutting surface of the frame should also be true and smooth, and it is found to be `inconvenient to plane the front surface of the frame itself, a soft intervening cast-iron plate H is employed, which is planed to adapt it to the bars l l, and then inserted in the frame F, and retained by lips or projections, the parts D E being maintained in position by means of projections and recesses at k, with which the plate H and the parts D E are respectively provided, after which the whole is secured by wedges in the usual manner. If desired, the working-face A B=of the movable jaw may be provided with wroughtiron bars or strips in lieu of its being cast of metal of different degrees of hardness, as hereinbefore described.

l Both methods of constructing the surfaces of the working-faces are also applicable to breaking and reducing surfaces generally where a similar object is desired to be attained.

I claim as the invention secured to me for improvements in machinery or apparatus for breaking or reducing stones and other hard and brittle substances- 1. A jaw Whose toothed face is constructed substantially as set forth, so that the plane of the faceiof the upper portion of the length of such surface projects beyond the plane of the face of the lower portion of the length of such surface, and that the lines of the points and furrows of the teeth of the lower portion are diverted laterally from the lines of the points and furrows of the teeth of the upper portion, substantially as and for the purposes hereinbefore described.

2. A jaw in which theupper and lower portions of the toothed surface have their teeth of a different height and indi'erent vertical planes both in the transverse line of the face of the teeth and at right angles thereto, substantially as and for ,the purposes hereinbefore described.

3. The renewable working-faces of jaws, in which the teeth of the upper and lower portions are in different planes constructed in two or more parts, and fitted and secured to the jaw stock or frame in such a manner as to lenable them lto be reversed or renewed separately when worn, substantiall'yas hereinbefore described.

L1:..The acting-faces or portions of the crushingjaws, vmade substantially as herein set forth-that is to say, adapted to be removably fitted to, or contained within, a stock or frame, and constructedA with their front and back faces cast of metal of dierent degrees of hardness, as and for the purposes hereinbefore described.

5. A jaw having a. recession, substantially my name this 12th day of September, A. D.

veis herein shown and described. affording a 1876. Y

space for the stone or stones, after having been broken by the upper portion of the A' POLLOK toothed surfaces, to be turned and rolled over before being,` operated upon by t-he lower portion of the toothed surfaces, as hereinbefore Witnesses:

described. HENRY R. ELLIOTT,

In testimony whereof I have hereunto signed EWELL A. DICK.

Marsden, deceased.

Administrator of the estate of Henry Rowland

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